What is the definition of raphe?
Since you are in the dental section, I assume you mean palatine raphe. That is the line or ridge at the roof of your mouth that runs from the back of your palate to behind your front teeth. The ridge is there because your palate formed in two separate pieces and the ridge (or raphe) is where the two joined together.Definition: The line of union of 2 contiguous, bilaterally symmetrical structures.